Baotou beiben heavy truck engine parts in the use of some of the failure of piston pin abnormal sound. If the noise of piston pin will seriously damage the piston pin bushing wear, plus Dalian rod bearing and crankshaft, to wear the most serious, will pull the piston pin or rod top break cylinder, do not regard as unimportant.
Baotou beiben heavy truck parts piston pin abnormal fault phenomenon:
(1) the part of the abnormal sound in the upper part of the cylinder, the sound is like the collision between the two steel balls and the “special” sound.
(2) after the engine temperature increases, the sound is generally not much change, and sometimes the individual will be more obvious, and this is a major difference between the piston knocking cylinder ring.
After making the plug pin, you can use the following methods to judge:
(1) the oil cut test is carried out by cylinder. After the oil is cut off, the sound is obviously weakened or disappeared. Fault severity to a certain degree, there will be continuous coherent shuangxiang, off the oil, the sound not only weaken or disappear, but will exacerbate.
(2) engine jitter throttle test. In the case of a rapid wobble, the abnormal sound is quite obvious, and the period of the sound varies with the engine speed.
The main reasons for the existence of life plug pin off the following aspects:
(1) the piston pin and rod bushing wear too much, with serious songkuang. The main reason is due to poor lubrication caused by. No oil hole WD615 series engine connecting rod, piston pin and bushing is lubricated by oil injection nozzle upward through the oil groove of the connecting rod small end, if the oil pressure is too low, the spray is not good, will cause the bad lubrication of piston pin and rod bushing, and the injection piston cooling is not good, poor wear, also aggravate the piston pin and connecting rod bushing. If the oil deterioration, thinning will also cause increased wear. So, we must pay attention to the quality of oil, it is best to cycle oil, replace the oil filter, the quality of every day before going out to check the oil level and.
(2) Baotou beiben heavy truck accessories rod bushing under repair, the size of positioning and connecting rod bushing with no master, is not good, also can appear abnormal sound of piston pin. In the maintenance must be installed according to the standard, so that the connecting rod bushing can be pressed under a certain pressure.
After the piston pin is abnormal, different measures can be taken according to its weight:
(1) if the piston pin is slightly different, it may continue to travel, but if there is a repair condition, it is best to replace it.
(2) if the piston pin abnormal sound (at high speed, normal temperature operation, the sound is very obvious), should immediately repair replacement.
(3) replace the piston pin and the connecting rod bushing according to the standard.